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https://www.readbyqxmd.com/read/29161657/effects-of-local-lipopolysaccharide-administration-on-the-expression-of-toll-like-receptor-4-and-pro-inflammatory-cytokines-in-uterus-and-oviduct-of-rabbit-does
#1
Laura Menchetti, Olimpia Barbato, Iulia Elena Filipescu, Giovanna Traina, Leonardo Leonardi, Angela Polisca, Alessandro Troisi, Gabriella Guelfi, Federica Piro, Gabriele Brecchia
Inflammation of the uterus and oviduct is associated with reduced reproductive performance in humans and domestic animals. Toll-like receptors are expressed in various immune and non-immune cells and play a crucial role in innate immunity. Toll-like receptor - 4 (TLR4) can detect lipopolysaccharide (LPS) from Gram-negative bacteria leading to the secretion of pro-inflammatory cytokines, chemokines, antimicrobial peptides and other inflammatory mediators. To investigate the effects of a local inflammation on the expression levels of TLR4 and pro-inflammatory cytokines, 12 female rabbits received an intracervical infusion with either saline solution endotoxin-free (carrier, 2 mL; n = 6) or LPS (500 μg diluted in 2 mL of saline solution; n = 6)...
November 5, 2017: Theriogenology
https://www.readbyqxmd.com/read/29160913/bigger-testes-increase-paternity-in-a-simultaneous-hermaphrodite-independently-of-the-sperm-competition-level
#2
Nikolas Vellnow, Lucas Marie-Orleach, Kira S Zadesenets, Lukas Schärer
All sexually reproducing organisms face the evolutionary optimization problem of how much of their limited resources they should invest into male versus female reproduction, i.e., the problem of sex allocation (Charnov, 1982). Consider, for example, producing the optimal offspring sex ratio in gonochoristic (separate-sexed) animals. Since during sexual reproduction both parents contribute the same amount of nuclear genetic material to the zygote, the total fitness of males and females-on the population level-has to be equal (Düsing, 1884; Fisher, 1930; Houston & McNamara, 2006; Queller, 2006)...
November 21, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/29160553/the-evolutionary-dynamics-of-adaptive-virginity-sex-allocation-and-altruistic-helping-in-haplodiploid-animals
#3
Petri Rautiala, Heikki Helanterä, Mikael Puurtinen
In haplodiploids, females can produce sons from unfertilized eggs without mating. However, virgin reproduction is usually considered to be a result of a failure to mate, rather than an adaptation. Here we build an analytical model for evolution of virgin reproduction, sex-allocation, and altruistic female helping in haplodiploid taxa. We show that when mating is costly (e.g. when mating increases predation risk), virginity can evolve as an adaptive female reproductive strategy. Furthermore, adaptive virginity results in strongly divergent sex-ratios in mated and virgin queen nests ('split sex ratios'), which promotes the evolution of altruistic helping by daughters in mated queen nests...
November 21, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/29158981/fitness-implications-of-sex-specific-catch-up-growth-in-nephila-senegalensis-a-spider-with-extreme-reversed-ssd
#4
Rainer Neumann, Nicole Ruppel, Jutta M Schneider
Background: Animal growth is often constrained by unfavourable conditions and divergences from optimal body size can be detrimental to an individual's fitness, particularly in species with determinate growth and a narrow time-frame for life-time reproduction. Growth restriction in early juvenile stages can later be compensated by means of plastic developmental responses, such as adaptive catch-up growth (the compensation of growth deficits through delayed development). Although sex differences regarding the mode and degree of growth compensation have been coherently predicted from sex-specific fitness payoffs, inconsistent results imply a need for further research...
2017: PeerJ
https://www.readbyqxmd.com/read/29158565/convergent-evolution-of-plant-and-animal-embryo-defences-by-hyperstable-non-digestible-storage-proteins
#5
María Yanina Pasquevich, Marcos Sebastián Dreon, Jian-Wen Qiu, Huawei Mu, Horacio Heras
Plants have evolved sophisticated embryo defences by kinetically-stable non-digestible storage proteins that lower the nutritional value of seeds, a strategy that have not been reported in animals. To further understand antinutritive defences in animals, we analysed PmPV1, massively accumulated in the eggs of the gastropod Pomacea maculata, focusing on how its structure and structural stability features affected its capacity to withstand passage through predator guts. The native protein withstands >50 min boiling and resists the denaturing detergent sodium dodecyl sulphate (SDS), indicating an unusually high structural stability (i...
November 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29157209/transcriptome-sequencing-and-analysis-of-zinc-uptake-related-genes-in-trichophyton-mentagrophytes
#6
Xinke Zhang, Pengxiu Dai, Yongping Gao, Xiaowen Gong, Hao Cui, Yipeng Jin, Yihua Zhang
BACKGROUND: Trichophyton mentagrophytes is an important zoonotic dermatophytic (ringworm) pathogen; causing severe skin infection in humans and other animals worldwide. Fortunately, commonly used fungal skin disease prevention and treatment measures are relatively simple. However, T. mentagrophytes is primarily studied at the epidemiology and drug efficacy research levels, yet current study has been unable to meet the needs of clinical medicine. Zinc is a crucial trace element for the growth and reproduction of fungi and other microorganisms...
November 21, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29156995/combined-repeated-dose-and-reproductive-developmental-toxicity-screening-test-of-benzene-1-1-oxybis-tetrapropylene-derivs-in-rats
#7
Yasuhiro Tsubokura, Ryuichi Hasegawa, Sunao Aso, Toshio Kobayashi, Takayuki Koga, Satsuki Hoshuyama, Yutaka Oshima, Katsumi Miyata, Yuji Kusune, Takako Muroi, Naoki Hashizume, Yoshiyuki Inoue, Shozo Ajimi, Kotaro Furukawa
We have conducted animal toxicity tests of chemicals for a chemical safety program implemented by the Ministry of Economy, Trade and Industry of Japan. Here we conducted a combined repeated-dose and reproductive/developmental toxicity screening test of benzene, 1,1'-oxybis-, tetrapropylene derivs. (BOTD). BOTD was administered to 9-week-old Crl:CD(SD) male and female rats by gavage at 0, 40, 200, or 1000 mg/kg/day. Males were treated for 42 days including mating period. Females were treated for 42-53 days through the premating, mating, pregnancy, and until Day 4 of lactation periods...
November 20, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/29155610/seasonal-and-sexual-variation-in-metabolism-thermoregulation-and-hormones-in-the-big-brown-bat-eptesicus-fuscus
#8
Christopher S Richardson, Tim Heeren, Thomas H Kunz
In response to seasonal variation in energy availability and thermal environment, physiological and endocrine mechanisms have evolved in temperate zone animals. Seasonal changes in hormone activity affect metabolism, body temperature, and reproductive activity. We examined the seasonal regulatory role of hormones on basal metabolic rate (BMR) and regulatory nonshivering thermogenesis (RNST) in 98 female and 17 male adult Eptesicus fuscus (big brown bat). We measured BMR, RNST, and plasma levels of thyroid hormone (T3), leptin, and cortisol in bats captured in maternity colonies in eastern Massachusetts from May to August (from arousal from the hibernation phase to the prehibernation phase)...
January 2018: Physiological and Biochemical Zoology: PBZ
https://www.readbyqxmd.com/read/29154735/rumination-time-as-a-potential-predictor-of-common-diseases-in-high-productive-holstein-dairy-cows
#9
Riccardo Moretti, Stefano Biffani, Francesco Tiezzi, Christian Maltecca, Stefania Chessa, Riccardo Bozzi
We examined the hypothesis that rumination time (RT) could serve as a useful predictor of various common diseases of high producing dairy cows and hence improve herd management and animal wellbeing. We measured the changes in rumination time (RT) in the days before the recording of diseases (specifically: mastitis, reproductive system diseases, locomotor system issues, and gastroenteric diseases). We built predictive models to assess the association between RT and these diseases, using the former as the outcome variable, and to study the effects of the latter on the former...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29153173/a-100-year-review-lactating-dairy-cattle-housing-management
#10
J M Bewley, L M Robertson, E A Eckelkamp
Since the mid-1800s, farmers have been housing livestock. What began as a part-time solution for cold winters, stormy days, or injured animals has evolved into the main or only area in which cows spend their adult lives. With this change, farmers, academic researchers, and industry innovators have shaped the farm landscape, literally. Over the last 100 years, changes have been made for productivity, health, milk quality, reproduction, animal well-being, and farm profitability. We review a snapshot of those changes and look ahead to the future of lactating dairy cattle housing...
December 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29153170/a-100-year-review-stress-physiology-including-heat-stress
#11
R J Collier, B J Renquist, Y Xiao
Stress is an external event or condition that places a strain on a biological system. The animal response to a stress involves the expenditure of energy to remove or reduce the impact of the stress. This increases maintenance requirements of the animal and results in loss of production. The biological response to stress is divided into acute and chronic phases, with the acute phase lasting hours to a few days and the chronic phase lasting several days to weeks. The acute response is driven by homeostatic regulators of the nervous and endocrine systems and the chronic phase by homeorhetic regulators of the endocrine system...
December 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29153162/a-100-year-review-a-century-of-change-in-temperate-grazing-dairy-systems
#12
J R Roche, D P Berry, A M Bryant, C R Burke, S T Butler, P G Dillon, D J Donaghy, B Horan, K A Macdonald, K L Macmillan
From 1917 to 2017, dairy grazing systems have evolved from uncontrolled grazing of unimproved pastures by dual-purpose dairy-beef breeds to an intensive system with a high output per unit of land from a fit-for-purpose cow. The end of World War I signaled significant government investments in agricultural research institutes around the world, which coincided with technological breakthroughs in milk harvesting and a recognition that important traits in both plants and animals could be improved upon relatively rapidly through genetic selection...
December 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29152699/comparative-analysis-of-the-protective-effects-of-curcumin-and-n-acetyl-cysteine-against-paracetamol-induced-hepatic-renal-and-testicular-toxicity-in-wistar-rats
#13
Zeynab Kh El-Maddawy, Yasser S El-Sayed
This study aimed to investigate the possible protective role of curcumin (CUR) vs. N-acetyl cysteine (NAC) against paracetamol (PCM)-induced oxidative damage and impairment of liver, kidney, and testicular functions, as well as hematotoxicity, in albino rats. A large single dose of PCM induced lipid peroxidation along with a significant decline in glutathione content and catalase activity in the liver, kidneys, and testicles. The apparent oxidative damage was associated with evident hepatic, renal, and testicular dysfunction, which was confirmed in histopathological lesions, and increased serum aspartate aminotransferase, alanine aminotransferase, and alkaline phosphatase activities...
November 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29152322/choosing-a-culture-medium-for-scnt-and-iscnt-reconstructed-embryos-from-domestic-to-wildlife-species
#14
REVIEW
A Cordova, W A King, G F Mastromonaco
Over the past decades, in vitro culture media have been developed to successfully support IVF embryo growth in a variety of species. Advanced reproductive technologies, such as somatic cell nuclear transfer (SCNT), challenge us with a new type of embryo, with special nutritional requirements and altered physiology under in vitro conditions. Numerous studies have successfully reconstructed cloned embryos of domestic animals for biomedical research and livestock production. However, studies evaluating suitable culture conditions for SCNT embryos in wildlife species are scarce (for both intra- and interspecies SCNT)...
2017: Journal of Animal Science and Technology
https://www.readbyqxmd.com/read/29152312/a-4-year-study-of-the-proportional-distribution-of-male-reproductive-organ-abnormalities-in-cattle-slaughtered-at-nyagatare-abattoir-eastern-rwanda
#15
Erick Kandiwa, Leoncie Nyirakunzimana, Gervais Habarugira, Borden Mushonga, Alaster Samkange
Male reproductive performance has more impact on overall herd productivity than in the female. In order to assess herd productivity in cattle in Nyagatare, Eastern Rwanda, the proportional distribution of male reproductive organ abnormalities was investigated in 3087 bulls slaughtered over a 4-year period. The aim of the study was to investigate the proportional distribution of male reproductive organ abnormalities in exotic and indigenous bulls slaughtered over a 4-year period at Nyagatare abattoir in Eastern Rwanda...
November 2017: Veterinary Medicine and Science
https://www.readbyqxmd.com/read/29152201/the-natural-selection-of-metabolism-and-mass-selects-lifeforms-from-viruses-to-multicellular-animals
#16
Lars Witting
I show that the natural selection of metabolism and mass can select for the major life-history and allometric transitions that define lifeforms from viruses, over prokaryotes and larger unicells, to multicellular animals. The proposed selection is driven by a mass-specific metabolism that is selected as the pace of the resource handling that generates net energy for self-replication. An initial selection of mass is given by a dependence of mass-specific metabolism on mass in replicators that are close to a lower size limit...
November 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29152168/pollination-by-the-locally-endangered-island-flying-fox-pteropus-hypomelanus-enhances-fruit-production-of-the-economically-important-durian-durio-zibethinus
#17
Sheema A Aziz, Gopalasamy R Clements, Kim R McConkey, Tuanjit Sritongchuay, Saifful Pathil, Muhammad Nur Hafizi Abu Yazid, Ahimsa Campos-Arceiz, Pierre-Michel Forget, Sara Bumrungsri
Fruit bats provide valuable pollination services to humans through a unique coevolutionary relationship with chiropterophilous plants. However, chiropterophily in the Old World and the pollination roles of large bats, such as flying foxes (Pteropus spp., Acerodon spp., Desmalopex spp.), are still poorly understood and require further elucidation. Efforts to protect these bats have been hampered by a lack of basic quantitative information on their role as ecosystem service providers. Here, we investigate the role of the locally endangered island flying fox Pteropus hypomelanus in the pollination ecology of durian (Durio zibethinus), an economically important crop in Southeast Asia...
November 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29150984/how-the-environment-shapes-animal-signals-a-test-of-the-acoustic-adaptation-hypothesis-in-frogs
#18
Sandra Goutte, Alain Dubois, Samuel D Howard, Rafael Márquez, Jodi J L Rowley, J Maximilian Dehling, Philippe Grandcolas, Rongchuan Xiong, Frédéric Legendre
Long distance acoustic signals are widely used in animal communication systems and, in many cases, essential for reproduction. The Acoustic Adaptation Hypothesis (AAH) implies that acoustic signals should be selected for further transmission and better content integrity under the acoustic constraints of the habitat in which they are produced. In the present study, we test predictions derived from the AAH in frogs. Specifically, we focus on the difference between torrent frogs and frogs calling in less noisy habitats...
November 18, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/29150338/impacts-of-prenatal-triclosan-exposure-on-fetal-reproductive-hormones-and-its-potential-mechanism
#19
Caifeng Wang, Limei Chen, Shasha Zhao, Yi Hu, Yijun Zhou, Yu Gao, Weiye Wang, Jun Zhang, Ying Tian
BACKGROUND: Triclosan (TCS) has been widely detected in pregnant women. The reproductive endocrine-disrupting effects of TCS have been observed in humans and animals. Little is known about the potential impact of prenatal TCS exposure on fetal reproductive development as well as its potential mechanism. OBJECTIVES: We investigated the potential effect of prenatal TCS exposure on fetal reproductive hormones in cord blood and its potential mechanism in relation to placental steroidogenic enzymes...
November 14, 2017: Environment International
https://www.readbyqxmd.com/read/29150304/are-the-estrogenic-hormonal-effects-of-environmental-toxins-affecting-small-intestinal-bacterial-and-microfilaria-overgrowth
#20
Edward Lichten
The important role of microfilaria (worms) in human and animal disease remains an area of key disagreement between the naturopathic and allopathic physicians. While microfilaria infections are rampart in undeveloped countries, they rarely rise to identification as a cause of disease in Western countries. New research studies in the diagnosis and treatment of SIBO (Small Intestinal Bacterial Overgrowth) and (IBD) Inflammatory Bowel Diseases of ulcerative colitis, Crohn's Disease and microcytic colitis may make both sides equally correct...
November 2017: Medical Hypotheses
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